JP3774458B2 - Rolling device for rolling mill - Google Patents

Abstract

Roller setup (1) for a rolling mill, especially a planetary inclined (sic) rolling mill with roller (3) on roller shaft (2), which is releasably connected to roller (3), has an arrangement (4) between the roller shaft and roller (3) for positive transfer of a drive turning moment from roller shaft (2) to roller (3). Roller setup (1) for a rolling mill, especially a planetary inclined (sic) rolling mill with roller (3) on roller shaft (2), which is releasably connected to roller (3), has a arrangement (4) between the roller shaft and roller (3) for positive transfer of a drive turning moment from roller shaft (2) to roller (3). Arrangement (sic) (4) comprises a first gear (5) connected to the roller shaft and a second gear (6) connected to roller (3), and gears (5) and (6) have positive meshing.

Description

The present invention comprises a roll which is disposed on the roll axis, the roll is removably coupled to the roll axis, between the roll shaft and the roll, means for causing reached transfer the drive torque from the roll shaft to the roll The present invention relates to a roll device for a rolling mill, particularly a planetary type cross rolling mill (Planetenschraegwalzwerk).

  Especially in planetary rolling mills, when a roll with a conical outer contour is placed on the roll axis, the drive torque can be reliably transmitted from roll axis to roll, but roll replacement Must be arranged so that

  For the application examples as described above, it is known to use a roll shaft in which a roll is detachably disposed. In this case, in order to fix the roll, a voith / end face tooth portion fixed by a hydraulic pressure through a tie rod is usually used.

  According to another solution, fixing is performed on the basis of the principle of the fitting key through a claw on the end face side held by a roll by a central screw.

Both solutions have the following disadvantages:
When an end face tooth part is used with a tie rod, a strong thrust force is generated by the voith / end face tooth part, and this thrust force must be absorbed. Furthermore, this solution concept is relatively expensive with respect to the production of hollow shafts, tie rods and toothed rings required for realization. Also, a hydraulic tool is required to tension and relax the tie rod. Furthermore, this solution is disadvantageous in that it can only be applied when a toothed connection is provided in the rolling adjustment part of the rolling head. A tie rod cannot be used if a hydraulic clamping mandrel is used for the reduction control section.

  In the case of the nail fixing method, it is a drawback that the manufacture of the nail is relatively troublesome. Normally, four claws are used that are evenly distributed in the circumferential direction, but these claws are rarely even because of manufacturing tolerances. Therefore, great wear and overload occur on the carrying surface. In the case of the claw structure, the bending force is absorbed by two short cylindrical seats. Since the roll is seated very firmly on the seating portion, it is necessary to heat the roll to some extent during attachment. A particular problem is that it is difficult to remove because the roll is firmly seated. Immediately after stopping the rolling mill, the roll must be pulled out when it is still warm. Further, when the claw fixing method is adopted, the cylindrical seating portion on which the bending force is on the roll shaft is rapidly worn. Since the production of nails is relatively expensive, rolls as wear parts are very expensive.

  An object of the present invention is to improve the roll apparatus of this type so that the above-mentioned drawbacks can be eliminated. In particular, the roll apparatus can be configured so that torque and bending load are optimally transmitted during rolling operation, and roll replacement can be easily performed. In other words, the parts required for the roll device, particularly the roll, can be manufactured at a low cost.

This object is achieved according to the present invention, the means for the driving torque reached Den has a first toothed ring which is connected to the roll shaft and relative rotation, is non-rotatably coupled rolls relative This is solved by having a second toothed ring, with both toothed rings having axial teeth that engage each other.

  When employing the inventive concept, it is advantageous for the toothed rings to be arranged respectively in the roll axis or in the axial end region of the roll.

  The toothed ring may be configured as a straight tooth. In this case, a multi-spline type tooth portion according to DIN 5480 is used.

  According to another configuration, at least one, preferably both, of the toothed rings are arranged non-rotatably on the roll shaft or roll using pins. In this case, the axis of the pin is advantageously arranged parallel to the roll axis or the axis of the roll.

  According to another advantageous configuration, the roll is arranged on the roll axis via a conical centering ring. In this case, in order to obtain a suitable seating, it is advantageous for the conical centering ring to have a length of at least 30% of the axial extension of the roll.

  The roll may be coupled to the roll shaft by a screw coupling portion. In this case, it is advantageous for the screw connection to consist of a single screw arranged coaxially with respect to the roll or roll axis.

  When the packing is disposed between the roll and the roll shaft, the operation reliability is improved.

The solution according to the invention provides the following various advantages.
First, transmission of torque and bending load can be improved as compared with the conventional claw method described at the beginning.

  Furthermore, roll replacement can be performed easily and quickly. Of particular advantage in this connection is that the cone does not have a self-locking action, so that it is not necessary to heat and pull the roll. Similarly, it is not necessary to heat the roll when attaching the roll. The roll change is advantageous because it does not require a tool (hydraulic drawing tool).

  Since the roll as a wear part has a very simple contour and can therefore be manufactured at low cost, there is an economic effect. Moreover, since the existing toothed ring can be used with a new roll, the cost is reduced.

  This is advantageous because a thrust force is not generated in the tooth portion as compared with a known fixing method in which the roll is fixed by a voith / end face tooth portion via a tie rod. The conical hole of the roll extends substantially parallel to the conical outer contour. This reduces the risk of roll cracking compared to known solutions.

  Finally, the concept proposed in accordance with the present invention is also advantageous in that it can be retrofitted to existing rolling mills without significant costs.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The roll device 1 has a roll shaft 2. The roll shaft 2 can rotate around the rotation axis D. A roll 3 is fixed to one end (right end in the drawing) of the roll shaft 2 in the axial direction. The centering of the roll 3 with respect to the roll shaft 2 is performed via a conical centering portion 9, that is, via a conical seat that couples the two members to each other. Fixing of the roll 3 on the roll shaft 2 is performed via a screw coupling portion 10. The screw coupling portion 10 is configured as a single screw in the present embodiment, and its axis coincides with the rotation axis D.

As better alignment and concentric rotation of the roll 3 is guaranteed against the roll shaft 2, the length L of the conical centering part 9 extends over a substantial portion of the total length L ₀ in the axial direction of the roll 3 ing. In this case, the length L of the conical centering part 9 should be at least 30% of the axial length L ₀ of the roll 3. This ensures that the bending force of the roll 3 is absorbed by the roll shaft 2 because the conical seat is relatively long.

The drive torque is introduced into the roll shaft 2 so that it can be reliably transmitted to the roll 3, means 4 for causing reached transfer is provided a driving torque from the roll shaft 2 to roll 3. This means 4 has two toothed rings 5 and 6. The two toothed rings 5 and 6 are configured to transmit torque via a large number of teeth (axial teeth) in a cooperative state. In this embodiment, a multi-spline type tooth portion according to DIN 5480 is used.

  The first toothed ring 5 is disposed on the roll shaft 2 so as not to rotate relative to the roll shaft 2, while the second toothed ring 6 is fixed to the roll 3 so as not to rotate relative to the roll shaft 2. The toothed rings 5 and 6 are fixed via pins 7 and 8, respectively. A certain number of pins 7, 8 are distributed and arranged around the toothed rings 5, 6. In this case, the axes of the pins 7 and 8 are oriented parallel to the rotation axis D.

  Further, a packing 11 is attached between the roll shaft 2 and the roll 3.

It is sectional drawing of the roll apparatus by this invention used for a planetary type cross rolling mill.

Explanation of symbols

1 roll apparatus 2 roll shaft 3 roll 4 drive torque roll axis 2 from unit 5 first toothed ring 6 and the second toothed ring 7 Pin 8 Pin 9 conical centering portion for reached transfer to roll 3 10 Screw coupling portion 11 Packing L Length of conical alignment portion L ₀ Extension distance of roll in axial direction

Claims (10)

A roll (3) is disposed on the roll shaft (2), the roll (3) is detachably coupled to the roll shaft (2), and the roll is interposed between the roll shaft (2) and the roll (3). the driving torque from the shaft (2) to the roll (3) in the means (4) roll apparatus rolling mill is arranged for reached Den,
Means for the driving torque reached Den (4), the roll shaft (2) and the relative rotation coupled to it are first toothed ring (5), is relatively non-rotatably coupled with the roll (3) and a and has a second toothed ring (6), roll apparatus in which both toothed rings (5, 6), characterized in that it has a toothing in the axial direction to be engaged with each other. 2. Roll device according to claim 1, characterized in that the toothed rings (5, 6) are arranged in the axial end region of the roll shaft (2) or roll (3), respectively. 3. Roll device according to claim 1 or 2, characterized in that the toothed ring (5, 6) is configured as a straight tooth. 2. At least one of the toothed rings (5, 6) is arranged non-rotatably on the roll shaft (2) or roll (3) using pins (7, 8). The roll device according to any one of 3 to 3. 5. Roll device according to claim 4, characterized in that the axis of the pins (7, 8) is arranged parallel to the axis of the roll shaft (2) or the roll (3). 6. Roll device according to claim 1, characterized in that the roll (3) is arranged on the roll axis (2) via a conical centering ring (9). Wherein the conical centering ring (9) has at least 30% of the length of the roll axial direction of the extended distance (3) (L ₀₎ a (L), in claim 6 The roll apparatus as described. 8. Roll device according to claim 1, wherein the roll (3) is connected to the roll shaft (2) by means of a screw connection (10). 9. Roll device according to claim 8, characterized in that the screw connection (10) consists of a single screw arranged coaxially with respect to the roll (3) or the roll axis (2). 10. The roll device according to claim 1, wherein a packing (11) is arranged between the roll (3) and the roll shaft (2).

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